package shopping.demo;

import java.time.LocalDateTime;
import java.util.Random;
import java.util.Scanner;

public class BuyBook {
    //初始化
    static Book[] books=new Book[4];
    static {
        System.out.println("欢迎光临实验书社");
        books[0]=new Book(1,"红楼梦",50,10);
        books[1]=new Book(2,"水浒传",40,10);
        books[2]=new Book(3,"三国演绎",30,10);
        books[3]=new Book(4,"西游记",20,10);
    }
    public static void main(String[] args) {
        //显示图书
        showBook(books);
        //购物
        Person p=new Person("张三");
        Book book= p.buyBook(books);
        //结算
        showTotal(book,p);

    }
    //显示图书方法
    public static void showBook(Book[] book){
        System.out.println("编号\t图书名称\t图书价格\t库存数量");
        for(int i=0;i<book.length;i++){
            System.out.println(book[i].getId()+"\t"+book[i].getName()+"\t"+book[i].getPrice()+"\t"+book[i].getStorage());
        }
    }
    //结算  购买一种图书
    public static void showTotal(Book book,Person p){
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入购买的数量");
        int num=sc.nextInt();
        double total=book.getPrice()*num;
        Random random=new Random();
        int orderNum=random.nextInt();//产生随机数作为订单编号
        System.out.println("订单编号:"+Math.abs(orderNum));
        System.out.println("购物时间:"+LocalDateTime.now());
        System.out.println("会员:"+p.getName());
        System.out.println("图书名称："+book.getName()+"\t单价："+book.getPrice()  +"\t购买数量："+num+"\n总价钱："+total);
    }
}
